Varec 4000 - Manual (Page 37)

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4000 Maintenance and Troubleshooting
4 Maintenance and Troubleshooting
4.1 Maintenance
The Varec Model 4000 Advanced Technology Transmitter (ATT) is designed and manufactured to provide accurate and
reliable operation without a requirement for regularly scheduled maintenance.
Due to the modular construction of the ATT, necessary repairs can be quickly and safely accomplished.
Caution! When performing service or repair of any kind on the ATT, follow all instructions relative to power on/off requirements.
It is recommended that all necessary repairs be performed by a factory trained service engineer.
4.2 Battery Replacement
The ATT contains a battery module to maintain incremental count information during power outages. The battery shelf
life is ten years and active life is 10 days. The ATT monitors the battery voltage and will indicate a low battery status
to the host computer. The battery status can also be checked using the Handheld Terminal under the Summary Menu.
The ATT may indicate a low battery condition for several reasons:
•
A brand new unit is shipped with the battery turned off.
•
The battery is really low or bad.
•
Someone has actually turned the battery off from the host computer or via the Handheld Terminal if an extended
power outage was anticipated.
•
The ATT may have automatically turned its battery off. This occurs to preserve the battery if a power outage
occurs for more than a 24 hour period.
Using a Handheld Terminal get into the Alter Mode of operation. Check if the battery is really bad by calibrating the
level. This turns on the battery circuitry automatically. Perform an Exit and Save and log back in using the Display
Mode. The Summary Menu indicates the status of the battery as tested by the ATT.
Caution! Power to the ATT must be off before attempting to replace the battery. Do not apply power to the ATT until battery
replacement is complete and all covers have been replaced.
If the battery is still bad, perform the following to replace it:
1. Turn off all power to the ATT and remove the electronics' cover.
2. Locate the two covered batteries marked BT1 and BT2.
3. Slide off the battery cover.
4. Remove by sliding the batteries to the side and not straight out.
5. Replace with new batteries and replace battery cover.
6. Replace the ATT's cover
7. Turn the power to ATT back on.
8. Calibrate the level.